Two new dicyemids from Sepia longipes (Mollusca: Cephalopoda: Decapoda).
Two new species of dicyemid mesozoan are described from Sepia longipes, Sasaki, 1913, collected from Tosa Bay in Japan. Dicyema oxycephalum n. sp. is a medium-sized species that is about 1,800 microm in length. It lives in folds of the renal appendages. The vermiform stages are characterized as having 28-34 peripheral cells, a conical calotte, and an axial cell that extends to the base of the propolar cells. Infusoriform embryos consist of 39 cells; 2 nuclei are present in each urn cell and the refringent bodies are solid. Pseudicyema cappacephalum n. sp. is also a medium-size species; it is about 1,000 microm in length. It too lives in folds of the renal appendages. The vermiform stages are characterized as having 32-34 peripheral cells, a cap-shaped calotte, and an axial cell that extends to the base of propolar cells. Infusoriform embryos consist of 39 cells; 2 nuclei are present in each urn cell and the refringent bodies are solid. This is the first description of dicyemids from S. longipes.
Furuya
Hidetaka
H
Department of Biology, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan. hfuruya@bio.sci.osaka-u.ac.jp
D000818:Animals; D005260:Female; D007448:Invertebrates / Q000033:anatomy & histology / Q000145:classification* / Q000196:embryology / Q000502:physiology; D008297:Male; D012098:Reproduction; D049833:Sepia / Q000469:parasitology*